VOL. XCIV, NO. 247
★ WIDE MOAT STOCKS COMPARISON ★
NO ADVICE
Thursday, January 8, 2026
Stock Comparison
American Express Company vs Duolingo, Inc.
Compare moat strength, market structure, and segment coverage to understand how each company defends its edge.
American Express Company
AXP · New York Stock Exchange
Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.
Full stock profile
Dive deeper into American Express Company's moat claims, evidence, and risks.
View AXP analysisDuolingo, Inc.
DUOL · NASDAQ
Weighted average of segment moat scores, combining moat strength, durability, confidence, market structure, pricing power, and market share.
Full stock profile
Dive deeper into Duolingo, Inc.'s moat claims, evidence, and risks.
View DUOL analysisComparison highlights
- Moat score gap: Duolingo, Inc. leads (68 / 100 vs 52 / 100 for American Express Company).
- Segment focus: American Express Company has 4 segments (47.5% in U.S. Consumer Services (USCS)); Duolingo, Inc. has 2 segments (93.9% in Duolingo App).
- Primary market structure: Competitive vs Competitive. Pricing power: n/a vs Moderate.
- Moat breadth: American Express Company has 8 moat types across 3 domains; Duolingo, Inc. has 6 across 3.
Primary market context
American Express Company
U.S. Consumer Services (USCS)
U.S. premium consumer card issuing (charge and credit) and attached consumer banking and financing
United States
Consumers
Issuer (proprietary cards) and consumer lender/services
47.5%
Duolingo, Inc.
Duolingo App
Mobile-first, freemium language learning and adjacent subjects (math, music)
Global
Consumers (end-users); advertisers
Digital learning platform / content & software publisher
93.9%
Side-by-side metrics
Moat coverage
Shared moat types
American Express Company strengths
Duolingo, Inc. strengths
Segment mix
American Express Company segments
Full profile >U.S. Consumer Services (USCS)
Competitive
Commercial Services (CS)
Competitive
International Card Services (ICS)
Competitive
Global Merchant and Network Services (GMNS)
Oligopoly
Duolingo, Inc. segments
Full profile >Duolingo App
Competitive
Duolingo English Test
Oligopoly
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Proven models entering the expansion stage with unit economics that work.
View expansion-stage stocksCuration & Accuracy
This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).
Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.